Apparently made some Washburn models around 1988 or so with a serial number starting with a K and they might have also made some Jackson and BC Rich guitars. It is the list of features on its window. 21 - norman model b20-hg acoustic guitar, made in quebec, canada, serial number 02273930, comes with. FOR RANDY: The Washburn 'Woodstock' (Model EA40 and EA40 12) were made from 1979 to 1991 in both 6-String and 12-String models with a MSRP of $1,000.00 and $1,040.00 USD respectively. Tips for Dating a Guild Guitar and Guild Dating Information. The bottom and sides are flamed maple CP's solid spruce top. 1990 Washburn D10N Dreadnought Guitar While you might expect this guitar to be filed under my 'don't bother to buy' category of flea-market adventuring, I have to say that it actually sounds really good for an all-ply, budget box.